Atlas - SDL_ngageaudio.hpp
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[FILE BEGIN]
1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2025 Sam Lantinga <[email protected]>
4
5  This software is provided 'as-is', without any express or implied
6  warranty.  In no event will the authors be held liable for any damages
7  arising from the use of this software.
8
9      Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12
13  1. The origin of this software must not be misrepresented; you must not
14     claim that you wrote the original software. If you use this software
15     in a product, an acknowledgment in the product documentation would be
16     appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18     misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20*/
21
22#ifndef SDL_ngageaudio_hpp
23#define SDL_ngageaudio_hpp
24
25#include <e32base.h>
26#include <e32std.h>
27#include <mda/common/audio.h>
28#include <mdaaudiooutputstream.h>
29
30#ifdef __cplusplus
31extern "C" {
32#endif
33
34#include "../SDL_sysaudio.h"
35#include "SDL_ngageaudio.h"
36
37#ifdef __cplusplus
38}
39#endif
40
41TBool AudioIsReady();
42void InitAudio(TInt *aLatency);
43void DeinitAudio();
44
45class CAudio : public CActive, public MMdaAudioOutputStreamCallback
46{
47  public:
48    static CAudio *NewL(TInt aLatency);
49    ~CAudio();
50
51    void ConstructL(TInt aLatency);
52    void Start();
53    void Feed();
54
55    void RunL();
56    void DoCancel();
57
58    static TInt ProcessThreadCB(TAny * /*aPtr*/);
59
60    // From MMdaAudioOutputStreamCallback
61    void MaoscOpenComplete(TInt aError);
62    void MaoscBufferCopied(TInt aError, const TDesC8 &aBuffer);
63    void MaoscPlayComplete(TInt aError);
64
65    enum
66    {
67        EStateNone = 0,
68        EStateOpening,
69        EStatePlaying,
70        EStateWriting,
71        EStateDone
72    } iState;
73
74  private:
75    CAudio();
76    void StartThread();
77    void StopThread();
78
79    CMdaAudioOutputStream *iStream;
80    TMdaAudioDataSettings iStreamSettings;
81    TBool iStreamStarted;
82
83    TPtr8 iBufDes;           // Descriptor for the buffer.
84    TInt iLatency;           // Latency target in ms
85    TInt iLatencySamples;    // Latency target in samples.
86    TInt iMinWrite;          // Min number of samples to write per turn.
87    TInt iMaxWrite;          // Max number of samples to write per turn.
88    TInt iBaseSamplesPlayed; // amples played before last restart.
89    TInt iSamplesWritten;    // Number of samples written so far.
90
91    RTimer iTimer;
92    TBool iTimerCreated;
93    TBool iTimerActive;
94
95    RThread iProcess;
96};
97
98#endif // SDL_ngageaudio_hpp
[FILE END]
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